For three critical days in July the Union and Confederate forces fought over the hills and valleys in and around Gettysburg, Pennsylvania.  During those three days the Union Army lost over 17,000 men to death or injury; the Confederates lost nearly 19,000.  This battle would become known as the ‘high water mark of the Confederacy’ and the last opportunity General Robert E. Lee would have to defeat the Union Army and to permanently separate the North and South into two countries.